Destroyed ships (as of now) do not drop anything. There is speculation that they might in the future, not entirely sure.
Let's admit ti, it is not about money, even if they demand cargo. People can make more in one trade run than they can doing hours of pirating. Even calling it that is a farce. They call it that to help romanticize it from what it really is, which is common theft. I agree that it is about inferiority and dominating others.
Anyway, old man rant off. Now back to trading. Saving up for a Python on my way to a Type-9.